Newsteadia americana Morrison

Vea, Isabelle M., 2014, Morphology of the males of seven species of Ortheziidae (Hemiptera: Coccoidea), American Museum Novitates 2014 (3812), pp. 1-36 : 13-17

publication ID 10.1206/3812.1


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Newsteadia americana Morrison


Newsteadia americana Morrison View in CoL

Figure 5 View FIGURE 5 Newsteadia americana Morrison, 1925: 147–150 .

MATERIAL EXAMINED: United States: Indiana, Parke Co., 2 miles E of Clinton, 1-2.vii.2006, Jim Nardi coll., deposited at USNM. 1/1 ad male in fair condition, but prothorax rather foreshortened and covered by prescutum .

DIAGNOSIS: Newsteadia americana differs from N. floccosa in lacking lateral branches of dorsal midcranial ridge (vs. present), ridge fading before reaching postoccipital ridge (vs. bifurcating posteriorly); trochanter and femur unfused (fused on N. floccosa ), number of tubular ducts smaller than on N. floccosa .

DESCRIPTION: Mounted material: Total body length 1.63 mm. Antennae nearly 1.3 times total body length; body with few setae, lp absent, but smp, each 2–3 µm wide, present sparsely throughout body.

Head: Width 260 µm and length 225–250 µm. Dorsally, midcranial ridge and dorsomedial part of epicranium as for genus; with (on each side) 2 or 3 flagellate hs, each about 55 µm long, plus 1 or 2 mcp near midcranial ridge. Laterally, compound eyes each about 95 µm long with about 45–50 ommatidia; ocelli 25 µm wide; preocular ridge as for genus. Ventrally, midcranial ridge extending from posterior margin of ventromedial part of epicranium anteriorly and fusing with dorsal arm; ventral arm strong and bifurcated posteriorly; ventromedial part of epicranium with 7–10 long hs ventral midcranial ridge setae (each about 50 µm long) + 4–8 mcp on either side of ventral midcranial ridge. Other structures as for genus. Antenna: Total length 2.08 mm (ratio of total body length to antennal length 1:1.28). Scape: 124 µm long, 57–60 µm wide, each with 10–12 long hs distally (each about 40 µm long) plus a spinose seta near base dorsally, without pores. Pedicel: length 82–84 µm, width 50 µm; each with 5 or 6 hs, 3 coeloconic sensilla ventrally + a campaniform sensilla dorsally, somewhat removed from distal margin. Segments III–X all filiform, becoming slightly narrower toward apex, proximal segments about 26 µm wide, apical segment about 20 µm wide: fs quite long, each about 43 µm long on basal segments but shorter on apical segment (some only 30 µm long); hs short, mostly 15–18 µm long; lengths of segments (µm): III 340–365; IV 335–360; V 320–335; VI 281–290; VII 240; VIII 185–188, and IX 185–195; approximate number of setae per segment: III–VIII each with about 16–18 fs + 2–6 hs. Segment IX elongate, with about 17 fs, 2 hs medially + 1 strong terminal bristle, about 30 µm long, and 1 antennal bristle laterally near apex, 45–50 µm long; coeloconic sensilla not detected.

Thorax: Prothorax: structures hard to see as partially covered by prescutum. Dorsally, no setae or small convex pores detected. Laterally, proepisternum + cervical sclerites complex, but structure unclear: anteriorly probably articulating with postocular ridge; structure probably similar to that on N. floccosa (see Koteja, 1986); pleural apophysis quite large. With 1 hs antemesospiracular seta on each side. Ventrally, prosternum and prosternal apophyses as for genus; number of prosternal setae uncertain but with 1 hs anteprosternal seta. Dorsally, prescutum, length uncertain but 207 µm wide; prescutal ridge almost absent, represented by a small sclerotization at anterior end; posteriorly, margin of prescutum delineated by a thin suture; prescutum without prescutal setae or pores. Prealare quite long, perhaps rather broad and well sclerotized, terminating near mesepisternum. Scutum with median area short, about 20 µm long; with 2 or 3 pairs of hs scutal setae + 0–2 minute pores on each side medially posterior to prescutum; without hs near lateral margins. Scutellum 145 µm wide, 128 µm long; bounded anteriorly by heavily sclerotized scutoscutellar suture; without setae but with 0 or 1 pair smp; posterior margin of scutellum marked by a thick ridge, which extends posterolaterally as posterior notal wing process to postalare. Laterally, tegula with 2 tegular setae but probably no smp. Mesepisternum not reticulated near lateropleurite; subepisternal ridge long and well developed. Mesopleural apophysis unclear. Mesothoracic spiracle: peritreme almost round, width 35 µm. Ventrally, basisternum, 375 µm wide, 170 µm long; with 9 or 10 hs basisternal setae + 0 or 1 smp on each side; furca large, narrow waisted, arms rather broad and very divergent, extending almost to marginal ridge anteriorly. Metathorax: Dorsally, metatergal setae: 4 present medially and 2 more laterally on each side, but without smp; metapostnotum present medially, small. Laterally, dorsospiracular setae absent and without smp. Dorsal part of metapleural ridge well developed but without hamulohalteres or suspensorial sclerites. Posterior part of metapleural ridge well developed; without “reticulations” along dorsal margin; metepisternum mildly sclerotized, without postmetaspiracular setae but with a few smp. Metepimeron represented by a sclerotized ridge running posteriorly, without setae. Metathoracic spiracle: peritreme almost round, width about 30 µm. Ventrally, metaprecoxal ridge strong, extending ventrally and appearing to fuse with a ridge along posterior margin of metasternum. Metasternum large and sclerotized, broader anteriorly than posteriorly, with a large subrectangular pit centrally, with strongly sclerotized lateral margins that fuse with metaprecoxal ridges; pit opens into a pair of metafurca; sclerotized area with a line of 6 long hs posterior metasternal setae on each side; apparently without anterior metasternal setae or pores. Wings: Forewing shape as for genus, 2.0 mm long, about 875 µm wide (ratio of length to width 1:0.44; ratio of total body length to wing length 1:1.23), each forewing with 3 alar setae plus a line of about 8–13 circular sensoria. Other structures as for genus. Legs: Mesothoracic legs shortest, others subequal in length. Fleshy setae few, short, with a blunt apex, easily separable from hairlike setae, without smp. Coxae: I 127; II 117–120; III 114–120 µm long; coxa III with about 13 hs; anterior surface of each coxa with platelike microridges with microspines. Trochanter + femur: I 485–493; II 405–408; III 450–460 µm long; trochanter III with 2 long setae (one about 25 and other about 65 µm long) + 1 fs (about 12 µm long); each trochanter with 3 oval sensoria on each side, arranged in a line, plus another more proximally; with a segmental line between trochanter and femur, almost at right angles to margin but probably with no articulation; femur III with about 45 long hs. Tibiae: I 545–555; II 525–530; III 600–605 µm; tibia III with many long hs (longest about 75 µm), these becoming spurlike on distal half to one-third, particular on ventral surface (each spur 20–25 µm long) plus 4 or 5 fs, each about 20 µm long. Tarsi: I 205–220; II 215; III 225–240 µm long (ratio of length of tibia III to tarsus III 1:0.39); tarsus III with many setae, mainly spurlike, but with 3 or 4 fs; claws length (III) 48–56 µm, with a hint of a small denticle.

Abdomen: Segments I–VII: tergites as for genus. Tubular pores: 13 present in a narrow band across tergite VII, each about 16–18 µm long, 7 µm widest, with a more heavily sclerotized inner end. Dorsal setae and pores (totals): segments I and II: 8–10 hs + 0–2 smp; III–VI: 8–12 hs + 12–16 smp; VII: about 36 hs, 13 tubular ducts + 0 smp; dorsal setae each about 33–35 µm long. Laterally, pleural setae: dorso- and ventropleural setae combined on each side: I–VII 3–6 hs + 2–5 smp; some setae rather long, up about 55 µm. Abdominal spiracles as for genus, each peritreme extremely small (perhaps 3 µm wide), opening into a narrow inner ductule about 13 µm long, before expanding into a wider trachea. Ventrally, sternites as for genus. Ventral setae similar to dorsal abdominal setae but longer, each about 50 µm long; (totals) I and II: 4 setae + 0 smp; III and IV: 16 setae + 10–12 smp; V and VI: 8–10 setae + 12–14 smp; VII: 4 setae on each side + 2 smp. Segment VIII: with 3 or 4 long hs dorsal abdominal setae (each 50–60 µm long). Genital segment: Anus about 32 µm wide. Penial sheath 330 µm long with segment VIII and 200 µm without; greatest width 215 µm; with a group of 8 or 9 short, rather blunt fs on either side of basal rod, each about 10 µm long; plus a further group of 3 or 4 fs on each margin anteriorly, each about 13 µm long; also a line of 6 or 7 fs along each posterior margin, each about 7 µm long; each side of penial sheath apex with a group of about 10 sensoria. Aedeagus about 200 µm long; articulating anteriorly with a short, quite heavily sclerotized basal rod about 40 µm long.


Smithsonian Institution, National Museum of Natural History













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